Hello all, In linux 5.4.21, when tell the compiler to use no optimzation for function early_fixmap_init as below, (I need to compile with O0 to follow what’s happening here using gdb.) #pragma GCC push_options #pragma GCC optimze ("O0") void __init early_fixmap_init(void) { ... } #pragma GCC pop_options I get this compiler error below. (make ARCH=arm64 CROSS_COMPILE=aarch64-none-elf- Image -j24) CALL scripts/atomic/check-atomics.sh CALL scripts/checksyscalls.sh CHK include/generated/compile.h CC arch/arm64/mm/mmu.o CC drivers/irqchip/irq-gic-v3.o In file included from ./include/linux/build_bug.h:5, from ./arch/arm64/include/asm/sysreg.h:758, from ./arch/arm64/include/asm/cputype.h:126, from ./arch/arm64/include/asm/cache.h:8, from ./include/linux/cache.h:6, from arch/arm64/mm/mmu.c:9: ./arch/arm64/include/asm/pgalloc.h: In function '__pgd_populate.constprop': ./include/linux/compiler.h:350:38: error: call to '__compiletime_assert_88' declared with attribute error: BUILD_BUG failed 350 | _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__) | ^ ./include/linux/compiler.h:331:4: note: in definition of macro '__compiletime_assert' 331 | prefix ## suffix(); \ | ^~~~~~ ./include/linux/compiler.h:350:2: note: in expansion of macro '_compiletime_assert' 350 | _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__) | ^~~~~~~~~~~~~~~~~~~ ./include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert' 39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) | ^~~~~~~~~~~~~~~~~~ ./include/linux/build_bug.h:59:21: note: in expansion of macro 'BUILD_BUG_ON_MSG' 59 | #define BUILD_BUG() BUILD_BUG_ON_MSG(1, "BUILD_BUG failed") | ^~~~~~~~~~~~~~~~ ./arch/arm64/include/asm/pgalloc.h:88:2: note: in expansion of macro 'BUILD_BUG' 88 | BUILD_BUG(); | ^~~~~~~~~ make[2]: *** [scripts/Makefile.build:265: arch/arm64/mm/mmu.o] Error 1 make[1]: *** [scripts/Makefile.build:509: arch/arm64/mm] Error 2 make: *** [Makefile:1652: arch/arm64] Error 2 make: *** Waiting for unfinished jobs.... AR drivers/irqchip/built-in.a AR drivers/built-in. What does this mean and what should I do? Thanks! Chan Kim |
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